First: I would add the guy that made the map as a co creator, thats not hard to do.
Second: The idea is good, and the map is more balanced but you made some mistakes:
---
https://steamcommunity.com/sharedfiles/filedetails/?id=1571614165
https://steamcommunity.com/sharedfiles/filedetails/?id=1571614028
This clip is bad.
---
https://steamcommunity.com/sharedfiles/filedetails/?id=1571612660
You forgot to clip the top of the new area, so you can boost on the roofs and even on the old clips so you can walk mid air.
---
https://steamcommunity.com/sharedfiles/filedetails/?id=1571612774
Make a new nav. file, the bots still walk around crates that dont exist anymore.
---
https://steamcommunity.com/sharedfiles/filedetails/?id=1571608252
The part of the railing where my crosshair is is not clipped.
---
https://steamcommunity.com/sharedfiles/filedetails/?id=1571612860
You messed up some parts of the old skybox


Now suggestions:
---
https://steamcommunity.com/sharedfiles/filedetails/?id=1571615846
You used the old office version, this hole is bigger in the new one and the clipping is better around the map.
---
https://steamcommunity.com/sharedfiles/filedetails/?id=1571613855
https://steamcommunity.com/sharedfiles/filedetails/?id=1571613709
Make is possible to jump on the pipes or remove them, its weird this way.
---
https://steamcommunity.com/sharedfiles/filedetails/?id=1571605850
The door open to slow (you can change that in the settings of the model) and the "exit"-sign is solid so you can jump against it.
---
https://steamcommunity.com/sharedfiles/filedetails/?id=1571613257
https://steamcommunity.com/sharedfiles/filedetails/?id=1571613491
Remove the chairs in the screenshots, maybe remove even more. They block and because window and door are new paths, they are just in the way.